a seismic event that may be caused by a sudden cracking action in frozen soil or rock saturated with water or ice. As water drains into the ground, it may eventually freeze and expand under colder temperatures, putting stress on its surroundings. This stress builds up until relieved explosively in the form of a cryoseism.

During the extreme cold event of late January 2019, northern Illinois experienced a rash of ice quakes. So what does it sound like? Q98.5 reports the sound resembles